Spinal fixation device with laterally attachable connectors

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/70 (2006.01)

Patent

CA 2240656

A spinal fixation device (10) includes a threaded stud (24) having an open- ended axial slot (30) to straddle a rod (14) of a vertebral support (12), and a bracket (22) which is rotatable on the stud (24). A vertebra bone screw (50) passes through an opening (48) in a distal end of the bracket (22). The stud (24) and bracket (22) are locked in position relative to the rod (14) by a nut (34). An insert (32) within the slot (30) bears against the rod (14) and prevents the stud (24) from being deformed by the force of the nut (34) on the stud segments. The bracket (22) can be be rotated around the stud (24); and the stud (24) can be rotated around and slid along the rod (14), to afford great adjustability and ease of attachment.

L'invention concerne un dispositif de fixation (10) pour la colonne vertébrale, lequel comprend un goujon fileté (24) à fente axiale ouverte (30) pour enserrer une tige (14) de support vertébral (12), et un support (22) pouvant être monté rotatif sur le goujon (24). Une vis vertébrale (50) passe par un orifice (48) de l'extrémité distale du support (22). Le goujon (24) et le support (22) sont bloqués en position par rapport à la tige (14) et au moyen d'un écrou (34). Une pièce insérée (32) dans la fente (30) appuie contre la tige (14) et empêche la déformation du goujon (24) par la force qu'exerce l'écrou (34) sur les segments du pivot. Le support (22) peut être mis en rotation autour du goujon (24), et le goujon (24) lui-même peut être mis en rotation autour de la tige (14) et glissé le long de celle-ci, ce qui confère à l'ensemble une grande faculté de réglage et une facilité de fixation.

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